Table 1 Descriptive statistics and statistical comparison of the halo disturbance index, pupil size and higher order aberrations for the clinical population (n = 83 eyes) before and after surgery.

	Preoperative mean (SD)	Postoperative mean (SD)	p Value
Pupil size (mm)	6.27 (0.84)	6.16 (0.81)	NS
HDI (%)	0.32 (0.23)	0.69 (0.47)	<0.001**
Total Rms (μm)	0.78 (0.36)	1.36 (0.61)	<0.001**
Trefoil (μm)	0.34 (0.29	0.34 (0.21)	NS
Coma (μm)	0.44 (0.25)	0.65 (0.39)	<0.001**
Tetrafoil (μm)	0.15 (0.15)	0.14 (0.09)	NS
Secondary astigmatism (μm)	0.17 (0.14)	0.24 (0.18)	0.004**
Spherical (μm)	0.36 (0.17)	0.99 (0.58)	<0.001**
Pentafoil (μm)	0.10 (0.11)	0.10 (0.06)	NS

HDI, halo disturbance index; NS, non significant; Rms, root mean square.

**Statistically significant at α = 0.01.